
XUNPU
A strong alternative matching key specs including mounting and orientation; verify mechanicals before use.
S4B-PH-K-S(LF)(SN) is a 4-pin, 2.0mm pitch, right-angle through-hole header from JST's PH series. This page reviews potential alternatives, focusing on electrical and mechanical compatibility.
Most candidates have different mounting or orientation. Only one matches the form factor.
All candidates meet or exceed the target's voltage and current ratings.
Multiple vendors offer electrically similar parts, though form factors vary.
No verified direct drop-in replacement has been confirmed. WAFER-PH2.0-4PWZ is a promising form-fit-function alternative pending a detailed mechanical drawing review.
WAFER-PH2.0-4PWZ by XUNPU is the strongest candidate, matching key specs including mounting type and orientation, but requires mechanical verification from the datasheet.
The primary risk is mechanical incompatibility. Most alternatives have different mounting types (SMT vs. TH) or orientations (straight vs. right-angle), requiring a PCB redesign.

XUNPU
A strong alternative matching key specs including mounting and orientation; verify mechanicals before use.
| Feature / factor | S4B-PH-K-S(LF)(SN) | WAFER-PH2.0-4PWZ | WF-1A200A4P | ZX-HY2.0-4PZZ | Compatibility / risk |
|---|---|---|---|---|---|
| Pin Count | 4 | 4 | 4 | 4 | 4 — matched; WF-1A200A4P: matched; ZX-HY2.0-4PZZ: matched; ZX-HY2.0-4PWT: matched |
| Pitch | 2.0mm | 2.0mm | - | - | 2.0mm — matched |
| Package | Through Hole, Right Angle | Through Hole, Right Angle | Through Hole, Straight | Through Hole, Straight | Through Hole, Right Angle / Through Hole, Straight / Surface Mount, Right Angle — Matches target form factor.; WF-1A200A4P: May not fit mechanically.; ZX-HY2.0-4PZZ: May not fit mechanically.; ZX-HY2.0-4PWT: Requires PCB redesign. |
| Voltage | 100V | 250V | 250V | 250V | 250V — stronger; WF-1A200A4P: stronger; ZX-HY2.0-4PZZ: stronger; ZX-HY2.0-4PWT: stronger |
| Current | 2A | 2.0A | 2.0A | 2.0A | 2.0A — matched; WF-1A200A4P: matched; ZX-HY2.0-4PZZ: matched; ZX-HY2.0-4PWT: matched |
XUNPU's WAFER-PH2.0-4PWZ appears to be the best alternative, matching the 4-pin, 2.0mm pitch, right-angle, through-hole configuration. However, you must verify its mechanical drawing against the JST part.